[amp_mcq option1=”ALU” option2=”CPU” option3=”Memory” option4=”Address E. None of the above” correct=”option2″]
The correct answer is B. CPU.
The instruction register (IR) is a register in the CPU that holds the current instruction being executed. It is a small register, typically 16 or 32 bits wide, that stores the opcode and operands of the instruction. The IR is used by the control unit to decode the instruction and fetch the operands from memory.
The ALU is the arithmetic and logic unit, which performs arithmetic and logical operations on data. The memory is where data and instructions are stored. The address is a number that identifies a location in memory.
None of the other options are correct because they are not registers in the CPU.